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如何从模型实例（具有来自 api 的值）传递数据并将其提供给 Text() 小部件？但请没有列表视图的示例。我只需要将值提供给 Text 小部件。

在第一个块中，我的天气实例有一个值，但我不知道如何将这个值提供给我的 Text 小部件。如果你能帮助我，我将不胜感激

home.dart 文件：

import 'package:flutter/material.dart';
import 'package:weather_mix_app/models/weather_model.dart';
import 'package:weather_mix_app/services/weather.dart';

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  List<WeatherModel> weather = new List<WeatherModel>();

  @override
  void initState() {
    super.initState();
    setupWeather();
  }

  setupWeather() async {
    Weather weatherInstance = Weather();
    await weatherInstance.fetchData();
    weather = weatherInstance.weather;
  }

  @override
  Widget build(BuildContext context) {
    return Container(child: Text('WHAT I NEED TO WRITE...'));
  }
}

我的 weather.dart（从 api 获取数据）

import 'dart:convert';

import 'package:http/http.dart';
import 'package:weather_mix_app/models/weather_model.dart';

class Weather {
  List<WeatherModel> weather = [];

  Future<void> fetchData() async {
    try {
      Response response = await get(
          'http://api.weatherstack.com/current?access_key=3327f40525a4577b7d0a75aea0c7d44f&query=New%20York');

      Map jsonData = jsonDecode(response.body);

      WeatherModel weatherModel = WeatherModel(
          description: jsonData['current']['weather_descriptions'],
          temp: jsonData['current']['temperature'],
          feels_like: jsonData['current']['feelslike'],
          query: jsonData['request']['query']);
      weather.add(weatherModel);
      print(weather);
    } catch (e) {
      print('caught error! $e');
    }
  }
}

和我的 weather_model.dart

class WeatherModel {
  dynamic description;
  dynamic temp;
  dynamic feels_like;
  dynamic query;

  WeatherModel({this.description, this.temp, this.feels_like, this.query});
}
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1 回答 1

0

您可以通过做来访问您的List<WeatherModel> weather = [];from ，因为它是一个列表，如果您只想显示第一个数据，您可以在Weatherhome.dartWeather().weatherText(Weather().weather[0].temp)

于 2021-02-15T06:13:47.590 回答